Definition from Wiktionary, the free dictionary
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- (intransitive, idiomatic, Of a group of people) Cease to be together, break apart from the group.
- After she left to go travelling, my girlfriend and I split up.
- The soldiers split up into smaller squadrons to search the building.
- (transitive) separate, disassociate, cause to come apart.
- The brothers never behaved in class when they were together, so we had to split them up for the exam.